Improvement in door-locks



lniied ,garnet paar cpm.

HERRMANN AHB-END,

OF NEW YORK, N. Y.

Leam Pam No. 85,776, maar .Tammy 12, 1ste.

To allwhom it concern t Beit known that I, HERRMANNAHREND, ofthe city, county, and-Stateof New York, have invented a new andA useful Improvement in Locks; and l' do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which drawing- Figure 1 represents a longitudinal section of this invention.

Figure 2 is a plan thereof when the back plate is removed.`

Figure 3 is a detached section of the unlockingmechanism. Y

Similailetters indicate corresponding parts.

This invention relates to a lock in which the bolt is thrown out by the action of a ring or handle, which is hinged to standards rising from the lock-plate, and which is provided with a toe that acts on a projection rising from the .shank of the bolt in such a manner that when the bolt is pushed back, and, consequently, the lock is open, the ring or handle is thrown out'in the proper position to open the drawer, door, or other article to whichthe lock is attached, and when the ring or handle is'turned down, the bolt is thrown out,'and

vthe dlawer, door, or other article becomes locked.

When the bolt is out in its locking-position, it is retained by a spring-catch, which is disengaged by the,

'action of a key on` a wedge, and on two levers, the ends 'of which are situated over a notched stud, and project over the end of a spring-catch in such a manner that if a key of the proper shape is applied, the wedge carries the levelsY directly over the notches in the stud, and as the .key is still further depressed, the levers enter said notches and causethe spring-catch to release'the bolt, allowing the same to follow the action of a spring', which carries it back to its original position.

A represents a plate or case, which supports the .mechanism o f iny lock.v

On this platerests the bolt B, which is exposed to back to the position which it occupies in figs. 1 and 2- of the. drawing.

The inner end" of the shank of the bolt is guided between two standards a, which-rise from the plate Aand these standards form the bearings for the fulcrum-pin b of the ring or handle D. 3

' From this ring projects a toe, c, which acts on a projection', d, rising from the shank of the bolt, as shown in g..l.

When the ring orhandle D is turned down iu the direction of the arrow marked near it in g. 1, the bolt is thrown out in its locking-positiom'and in 'this position it is retained by a spring-catch, e, .which catches in a recess, j; at the inner edge of' the shank of the bolt.

When the spring-catch is thrown out of the recess f, the bolt is released, and it is carried back toits original position by the action of' the spring C.

When the bolt is in this position, the ring or handle D occupies the position shown iu ig.` 1, and the door, drawer, or other article to which the lock is attached, can be opened with ease and facility. l

When the bolt is 'thrown out and retained by the spring-catch e, the handle or ring D can be turned down out of the way, orit c'au be turned out to the position shown in fig. 1, as-inay be desirable. l I The spring-catch c is released by the action of a key, K, (see iig. 3,) which is introduced through a tube, g, projecting from the back plate of the lock, as shown in fig. 1.

Thisv key consists of a simple piece of sheet-metal,

vono end of which is provided with a notch, h, and two prongs, 'i c', (see iig. 3,) and as the key is pushed down through the tube g,'the prongs straddle a wedge,j,'

which is situated over'two spring-levers, 7c k.

The ends of these levers project over the end of the spring-catch e, and also over a stud, l, which is pro- 'vided with two notches, m.'

If the proper key is used, the wedge j forces the levers l.: k apart just far enough to carry them over the notches m, and then the prongs 'i i bearing on the leversdepress them into the notches/m, and cause' them to act ou the sp1-in g-catch e, thereby releasing the saine.

If the notch h and prongs i t' ofthe key are not exactly of the required shape, the levers 7c 7c are either pressed apart too far, or not far enough, so that they cannot enter the notches m, and unless they can enter these notches they do not act on the spring-catch c, and the bolt remains locked.

, By these means, a lock is obtained which is very simple in its construction and operation, which requires but a verysrnall key, and which can only be pickedl with the greatest diiculty.

If i'ny lock' is to be used for doors on roomsor houses, an additional ring or handle can be attached to its opposite side, which can also be made to act on the bolt the same as the ring D.

Having thus described my' invention, v

What I claim as new, and desire to secure by Letters Patent, is-

, l. The construction and arrangement of' the bolt B, j, cl, ring D, having toe c, .spring O, and spring-catch e, all combined and operating in the manner described, whereby, when the catch c is released from notch j; the bolt B is thrown entirely inward and unlocked by the springDO, as set forth.

2. he wedge j 'and levers k lo, in combination with the notched stud Z,sp1ingcatch e, and bolt'B, substantially as and for. the purpose described.

HERRMANN AHREND.

Witnesses:

W. HAUFF, E. F. Kksrnnnnnn. 

